Lay a foundation before you set any brick
A brick patio on grass fails within a year or two because water pools underneath, frost heaves the bricks, and weeds push through the gaps. The fix is to remove the grass, compact the soil, and add a gravel base before the first brick goes down. This takes a weekend but saves you from rebuilding the whole thing in spring.
The process works the same whether your patio is 4 feet by 6 feet or 12 feet by 16 feet. You mark the area, remove the sod, level and tamp the soil, lay gravel, set a sand bed, arrange the bricks in your chosen pattern, and fill the joints. Each step matters—skipping the base is the most common mistake, and it costs you the whole patio.
Key Takeaways
- Remove the grass and dig down 4 to 6 inches so the finished patio sits level with or slightly above the surrounding ground.
- Compact the soil firmly with a hand tamper or plate compactor, then add 2 inches of gravel and compact again before laying sand.
- Lay landscape fabric under the gravel to stop weeds from growing up through the joints later.
- Set bricks in a running bond or herringbone pattern on a 1-inch bed of sand, tapping each one level with a rubber mallet.
- Fill the joints with polymeric sand, which hardens when wet and locks the bricks in place without washing out.
Mark the patio area and remove the grass
Use a garden hose or chalk line to outline the shape you want. For a rectangular patio, measure the diagonals—if they are equal, your corners are square. Mark the outline with spray paint or flour so you can see it clearly while you work.
Cut the sod into strips about 1 foot wide and 2 feet long using a flat spade, then peel it back and remove it. You can compost it, sell it, or lay it elsewhere in your yard. Dig down another 2 to 3 inches into the soil below so your finished patio sits at ground level or slightly higher. The total depth from the original grass surface to the bottom of the gravel should be 4 to 6 inches.
Rake the exposed soil smooth and remove any rocks, roots, or debris. Fill in any low spots with soil from the pile you created, then rake again. This step prevents water from pooling in one corner of the finished patio.
Compact the soil and lay the gravel base
Tamp the soil firmly with a hand tamper (a flat metal plate on a long handle) or rent a plate compactor from a home center for larger patios. Make overlapping passes across the entire area until the soil feels solid underfoot and does not sink when you step on it. This usually takes 3 to 5 minutes of tamping for a small patio.
Lay landscape fabric over the compacted soil to block weeds. Overlap the edges by 6 inches and find the corners with landscape staples so it does not shift when you add gravel. Spread 2 inches of crushed stone or pea gravel evenly across the fabric, then tamp it down with the same tool. The gravel should be firm enough that your footprint does not sink more than a quarter inch.
Check the level of the gravel base with a long straight board and a level. Place the board across the patio in several directions and adjust the gravel height so the surface is even. A slight slope of 1/8 inch per foot away from your house helps water drain, but avoid slopes steeper than that or the bricks will shift.
Spread sand and set the first row of bricks
Pour a 1-inch layer of coarse sand (also called mason sand) over the gravel. Do not use fine sand or play sand—they compact too much and drain poorly. Spread the sand with a rake and smooth it with a long straight board, scraping off the excess. The sand should be level across the entire patio, with no high or low spots.
Lay the first row of bricks along the straightest edge of your patio, usually the side closest to your house. Set each brick firmly into the sand by tapping it with a rubber mallet. Use a level to check that each brick is flat and level with its neighbors. If a brick sits too high, lift it, remove a pinch of sand, and reset it. If it sits too low, add a bit of sand underneath.
The first row sets the tone for the whole patio, so take time to get it right. Once the first row is level and straight, the rest of the bricks will follow the same plane.
Choose a brick pattern and fill in the rest
The two most common patterns for brick patios are running bond (bricks laid end-to-end in staggered rows, like a brick wall) and herringbone (bricks laid at 45-degree angles in a V-shaped pattern). Running bond is faster and uses fewer cut bricks. Herringbone looks more formal but requires cutting bricks at the edges.
Lay the second row of bricks following your chosen pattern, tapping each one level with the mallet. Work across the patio in rows, checking the level frequently. Every few rows, place the straight board across the patio to make sure the surface is still even. If one section is creeping higher than the rest, tap those bricks down or add sand under the lower ones.
When you reach the edges, you will need to cut some bricks to fit. Mark the brick with a pencil, then score it with a cold chisel and a hammer, tapping along the line until it breaks. A wet saw (available at tool rental shops) cuts cleaner edges if you have many bricks to trim. Lay the cut bricks the same way as the whole ones, tapping them level with the mallet.
Fill the joints with polymeric sand
Once all the bricks are set, sweep the patio with a stiff broom to remove loose sand from the surface. Pour polymeric sand (also called polymeric jointing sand) into the joints between the bricks. Sweep it back and forth across the patio so the sand fills the gaps completely. The sand should be level with the top of the bricks, not heaped above them.
Mist the patio lightly with a garden hose on a fine spray setting. Do not flood it—just wet the surface enough that the polymeric sand begins to harden. Let it dry for 24 hours before walking on it or allowing rain. The sand will set into a solid, weed-resistant joint that locks the bricks in place.
If rain falls within 24 hours of installation, the polymeric sand may wash out and you will need to reapply it. Check the weather forecast before you start, and plan to finish on a day when no rain is expected for at least two days.
Maintain the patio and watch for settling
A brick patio on a proper base will last 10 to 15 years with minimal care. Sweep it regularly to remove leaves and debris. If weeds grow in the joints despite the landscape fabric, pull them by hand or spray them with a weed killer safe for use around pavers. Do not use a pressure washer on the joints—the force can dislodge the polymeric sand.
In the first year, some bricks may settle slightly as the sand base compacts further. If you notice a brick that sits noticeably lower than its neighbors, you can lift it, add a bit of sand underneath, and reset it. This is normal and does not mean the patio was built wrong.
In cold climates, frost heave can lift bricks in winter. If this happens, wait until spring when the ground thaws, then tap the brick back down and add sand if needed. A proper gravel base and good drainage prevent most frost heave problems.
Frequently Asked Questions
How much does it cost to build a brick patio?
The cost depends on the size and the type of brick. A 10-by-12-foot patio with standard clay bricks typically costs between $300 and $600 in materials, plus tool rental if you do not own a plate compactor or wet saw. Labor costs vary by region if you hire someone to build it.
Can I lay bricks directly on grass without removing the sod?
No. Grass will rot underneath the bricks, creating air pockets that cause settling and cracking. Water will pool in those spaces and freeze in winter, pushing bricks up. Removing the sod and building a proper base is the only way to make a patio that lasts.
What if my yard is not level?
A slight slope is fine and actually helps drainage. If your yard slopes more than 1 inch per 4 feet, you may need to add a retaining edge or build the patio in steps. For steep slopes, consult a landscape professional before you start digging.
Do I need to seal brick after laying it?
Sealing is optional. It darkens the color and makes the brick easier to clean, but it is not necessary for the patio to function. If you seal, wait at least 30 days after installation so the polymeric sand can fully cure, then use a sealer made for pavers.
How long does it take to build a brick patio?
A 10-by-12-foot patio takes about 3 to 4 days working alone: one day to remove sod and prepare the base, one day to lay gravel and sand, one day to set the bricks, and one day to fill the joints and clean up. Larger patios take longer, but the process is the same.